Metallic piston-packing



(No Model.) I

- PPL M.

MET G PIS PACKING. No. 450,498. Patented Apr. 14,1891.

WITNESSES UNITED STATES PATENT FFICE.

NICHOLAS PFLAUM, OF PORT JERVIS, .NElV YORK.

METALLIC PISTON-PACKING.

SPECIFICATION forming part of Letters Patent No. 450,493, dated April 14, 1891.

Application filed November 3, 1890- Serial No. 370,189- (No model.)

To aZZ whom it may concern;

Be it known that l, NICHOLAS PFLAUM, of Port Jervis, in the county of Orange and State of New York, have invented a new and Improved Metallic Piston-Packing, of which the following is a full, clear, and exact description.

The invention relates to metallic pistonpackings, such as are shown and described in the Letters Patent of the United States No. 332,433, granted to me under date of December 15,1885.

The object of the present invention is to provide a new and improved packing similar in construction to the one above referred to, but arranged to prevent tangential displacement of the segments.

The invention consists of, a series of interior blocks having angular exterior surfaces, exterior segments fitted on the said angular surfaces, and longitudinally-extending keys fitted into the said blocks and segments.

The invention also consists of certain parts and details and combination of the same, as will be hereinafter fully described, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a face View of the improvement as applied, onehead of the piston being removed. Fig. 2 Ba sectional plan view of the same on the line 00 :r of Fig. 1. Fig. 3 is an inner face view of one of the segments. Fig. 4: is a sectional view of the same on the line 1 y of Fig. 3. Fig. 5 is an exterior face view of one of the blocks, and Fig. 6 is a crosssection of the same on the line .2 z of Fig. 5.

The improved metallic piston-packing is arranged between the heads A and B of the piston O, and is provided with a series of blocks D, each formed at its inner face with a segmental offset E, fitting onto the exterior surface of the'spider F of the piston O. The

- inner faces of the blocks D, to one side of the offset E, are also segmental and form with the spider F an annular recess G, in which are placed the springs II for pressing the blocks D outward.

Each of the blocks D is provided with angular outer surfaces D and D similar to the one shown in the patent above referred to. On two adjoining angular surfaces of two succeeding blocks'is fitted a segment I, adapted to be pressed in contact with the inner surface of the cylinder in which the piston is used by the action of the springs I'I. Each of the segments I is provided on its inner surface with tongues I, fitted into corresponding grooves D formed on the adjacent outer surfaces of two succeeding blocks D. In each of the segments I is also formed on the inner surface a transversely-extending dovetail 1?, extending at right angles to the tongues l and passing through the middle of the segment. A key J is adapted to fit into the dovetail 1 and projects above the inner surface of the segments to engage a correspondinglyshaped transverse groove D formed in the two adjacent blocks D. The tongues 1 and grooves D previously mentioned are similar to the ones shown in the patent above referred to and are for the purpose mentioned therein.

The keys J serve to prevent a tangential displacement of the segments I from the blocks D in the direction of the arrow a, as indicated in Fig. 1. The keys J, instead of being fitted into the dovetails I and grooves D may be secured to or formed integral with the segments 1, projecting, however, in a groove D", as above mentioned.

By arranging a packing in this manner, displacement of the segments 1 in any direction is impossible as long as the packing is in position on the piston 0.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A metallic piston-packing comprising a series of interior segmental blocks having angular surfaces and grooves formed therein, segments fitted on to the said angular surfaces of the blocks and provided with tongues engaging the said grooves in the segments and keys fitted longitudinally at right angles to the said tongues and grooves and between the adjacent blocks and the corresponding segments, substantially as shown and described.

tndinally 0n the inner surface of the said segments and engaging the other set of grooves 10 in the said blocks, substantially as shown and 2. A metallic piston-peeking comprising it series of interior segmental blocks having angular surfaces and two sets of grooves NICI'IOLAS PFLAUM. Witnesses:

WM. H. CRANE, Wit. A. PARSHALL. 

